unix_man: Put the synopsis at the top and wrap it in code blocks as well as pre
unix_man: Put the synopsis at the top and wrap it in code blocks as well as pre

These changes are intended to keep the formatting consistent with other current
plugins.

rasikapohankar/zeroclickinfo-fathead,thinker3197/zeroclickinfo-fathead,p12tic/zeroclickinfo-fathead,dankolbrs/zeroclickinfo-fathead,rasikapohankar/zeroclickinfo-fathead,thinker3197/zeroclickinfo-fathead,souravbadami/zeroclickinfo-fathead,p12tic/zeroclickinfo-fathead,souravbadami/zeroclickinfo-fathead,p12tic/zeroclickinfo-fathead,rasikapohankar/zeroclickinfo-fathead,samskeller/zeroclickinfo-fathead,thinker3197/zeroclickinfo-fathead,dankolbrs/zeroclickinfo-fathead,souravbadami/zeroclickinfo-fathead,nikhilsingh291/zeroclickinfo-fathead,samskeller/zeroclickinfo-fathead,samskeller/zeroclickinfo-fathead,p12tic/zeroclickinfo-fathead,nikhilsingh291/zeroclickinfo-fathead,thinker3197/zeroclickinfo-fathead,rasikapohankar/zeroclickinfo-fathead,samskeller/zeroclickinfo-fathead,dankolbrs/zeroclickinfo-fathead,nikhilsingh291/zeroclickinfo-fathead,dankolbrs/zeroclickinfo-fathead,p12tic/zeroclickinfo-fathead,souravbadami/zeroclickinfo-fathead,thinker3197/zeroclickinfo-fathead,thinker3197/zeroclickinfo-fathead,souravbadami/zeroclickinfo-fathead,nikhilsingh291/zeroclickinfo-fathead,souravbadami/zeroclickinfo-fathead,samskeller/zeroclickinfo-fathead,samskeller/zeroclickinfo-fathead,nikhilsingh291/zeroclickinfo-fathead,rasikapohankar/zeroclickinfo-fathead,nikhilsingh291/zeroclickinfo-fathead,dankolbrs/zeroclickinfo-fathead,rasikapohankar/zeroclickinfo-fathead,p12tic/zeroclickinfo-fathead,dankolbrs/zeroclickinfo-fathead